/*
 * Copyright (c) 2011, Marc-Andre Ferland - madrang@gmail.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the The Warrent Team nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *     * This software is free for non-commercial use. You may not use this
 *       software, in whole or in part, in support of any commercial product
 *       without the express consent of the author.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE WARRENT TEAM BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
using System;
using System.Runtime.InteropServices;

namespace OsHelper.Handles
{
	public class MemorySpace : Handle
	{
		public MemorySpace (int MySize) : base()
		{
			this.Size = MySize;
			this.SetHandle(Marshal.AllocHGlobal(this.Size));
		}
		
		public MemorySpace (IntPtr MyHandle, int MySize) : base()
		{
			this.Size = MySize;
			this.SetHandle(MyHandle);
		}
		
		protected override bool ReleaseHandle ()
		{
			if (!this.IsInvalid)
			{
				Marshal.FreeHGlobal (this.handle);
				this.SetHandleAsInvalid();
			}
			return true;
		}
		
		public int Size {
			get;
			private set;
		}
		
		public byte[] Data {
			get {
				byte[] ResultArray = new byte[this.Size];
				for (int i = 0; i < this.Size; i++) {
					ResultArray[i] = Marshal.ReadByte(this.handle, i);
				}
				return ResultArray;
			}
			set {
				for (int i = 0; i < this.Size; i++) {
					if(i > value.Length)
						Marshal.WriteByte(this.handle, i, 0);
					else Marshal.WriteByte(this.handle, i, value[i]);
				}
			}
		}
		
		public void Reset()
		{
			for (int i = 0; i < this.Size; i++) {
				Marshal.WriteByte (this.handle, i, 0);
			}
		}
		
	}
}
